The first date

First of all, I put myself in a positive mood. Whatever makes me happy will work: chocolate, snack, a cup of tea, favorite song, dance along or a chat with a friend. Then I start getting ready. I would take a shower, put makeup on, do my hair, wear something I like and feel confident in. I'll put a little bit of perfume in the end to add a finishing touch to my image. I am more than certain that if I go to a date with a positive outlook and be myself, I'll have a good time no matter what happens.

Right!

First of all, I put myself in a positive mood. Whatever makes me happy will work: [a/some] chocolate, a snack, a cup of tea, my favorite song, dancing along with music or a chat with a friend. Then, I would start getting ready. I would take a shower, put [on makeup/makeup on], do my hair, and wear something that I like and feel confident in. Finally, I'll would put a little bit of perfume on in the end to add the a finishing touch to my image. I am more than certain that if I go on to a date with a positive outlook and if I just be myself, I'll have a good time no matter what happens.

Good job. You are making a list of what makes you happy. Chocolate pure and simple makes you happy, but you might want to refer to it  as "some chocolate", or if they were chocolate candies, you sould even say "some chocolates" or "some chocolate candy" or "candies". If you meant just one piece of chocolate or one chocolate candy, you could say "a chocolate". However, in front of snack, you need "a". Chocolate makes me happy. We say that. But we don't say "Snack makes me happy." "A snack will make me happy." In front of favorite song, you could say "a favorite song", but it is a favorite song to you and if it is a specific favorite song, "my favorite song" would be better. There seems to be a need for more than just "dance along". I think "dancing along with music" or "to music" would work. Or if you mean dancing along to yor favorite song, try: "playing my favorite song and dancing along to it". The "Then" that you start the sentence with is serving as an initial conjunction at the beginning of a sentence, and initial conjuntions need commas after them. Since you are using the conditional tense with "would" in "I would take a shower", etc., I took the liberty in adding it to "I would start getting ready" and changing the future tense after "I would take a shower", where it says "I'll put a little bit of perfume on" to "I would put a little bit of perfume on". You can also use the contraction: "I'd put a little bit of perfume on". Saying "in the end" after that does not convey what is certainly your meaning. I think what you want is to begin the sentence with "Finally, I'd put a little bit of perfume on". I think that Finally" is conveying the meaning you intend with "in the end". You mention "finishing touch to my image". This needs an article in front of it. You have chosen the article "a", but remember that "a" is for referring to things specifically. However, "finishing touch to my image" is pretty specific and requires "the". We go "on" dates, not "to" dates. I think you need "if I just" in front of "be myself".

First of all, I put myself in a positive mood. Whatever makes me happy will work: some chocolate, a snack, a cup of tea, my favorite song, dancing along or chatting with a friend. Then I start getting ready. I would take a shower, put on make-up, do my hair, wear something I most like and feel confident in. Then to finish and apply a sensual touch to myself, I would wear  a little bit of perfume. I am more than certain that if I go on a date with a positive outlook and be myself, I'll spend a good time no matter what happens. (or something like this: the most important when going on a date is to be always myself with a positive outlook. In this way, I'm definetly sure I'll spend a good time and no matter what happening).

Nice job!

Отлигно Лилия ;-)